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Seadrift Coke, LP

Petroleum And Coal Products, Seadrift, Texas. NPDES permit TX0090948 expired Sep 11, 2025; its limits still apply. Last 12 months: over a limit once (last July 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: outfall 001 form A monthly (25 values), outfall 002 form A monthly (6 values), outfall 003 form A monthly (6 values), outfall 101 form A monthly (15 values), outfall TX1 form Q quarterly (28 values), outfall 001 form Y yearly, and 1 more form
Last report on file
August 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 55 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
July 2026Enterococci, daily maximum240 CFU/100mL≤ 89 CFU/100mL170%

Limits in force (83)

ParameterStatisticLimitMonthsOutfall
pHminimum≥ 6 SUall year001
pHmaximum≤ 9 SUall year001
Solids, total suspendeddaily average≤ 48 lb/dall year001
Solids, total suspendeddaily maximum≤ 97 lb/dall year001
Oil & Greasedaily average≤ 16 lb/dall year001
Oil & Greasedaily maximum≤ 24 lb/dall year001
Carbon, tot organic [TOC]daily average≤ 80 lb/dall year001
Carbon, tot organic [TOC]daily maximum≤ 160 lb/dall year001
Sulfate, total [as SO4]daily maximum≤ 1127 lb/dall year001
Chromium, total [as Cr]daily maximum≤ .98 lb/dall year001
Copper, total [as Cu]daily average≤ .056 lb/dall year001
Copper, total [as Cu]daily maximum≤ .12 lb/dall year001
Toluenedaily average≤ .048 lb/dall year001
Toluenedaily maximum≤ .096 lb/dall year001
Benzenedaily average≤ .096 lb/dall year001
Benzenedaily maximum≤ .192 lb/dall year001
Phenanthrenedaily average≤ .029 lb/dall year001
Phenanthrenedaily maximum≤ .061 lb/dall year001
1,1,1-Trichloroethanedaily average≤ .048 lb/dall year001
1,1,1-Trichloroethanedaily maximum≤ .096 lb/dall year001
Naphthalenedaily average≤ .048 lb/dall year001
Naphthalenedaily maximum≤ .096 lb/dall year001
Phenolsdaily average≤ .096 lb/dall year001
Phenolsdaily maximum≤ .192 lb/dall year001
Flow, in conduit or thru treatment plantdaily average≤ .202 MGDall year001
Flow, in conduit or thru treatment plantdaily maximum≤ .821 MGDall year001
Oxygen demand, chem. [high level] [COD]daily maximum≤ 150 mg/Lall year002
pHminimum≥ 6 SUall year002
pHmaximum≤ 9 SUall year002
Oil & Greasedaily maximum≤ 15 mg/Lall year002
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year002
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year002
Oxygen demand, chem. [high level] [COD]daily maximum≤ 150 mg/Lall year003
pHminimum≥ 6 SUall year003
pHmaximum≤ 9 SUall year003
Oil & Greasedaily maximum≤ 15 mg/Lall year003
Flow, in conduit or thru treatment plantdaily averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year003
BOD, 5-day, 20 deg. Cdaily average≤ 20 mg/Lall year101
BOD, 5-day, 20 deg. Cdaily maximum≤ 45 mg/Lall year101
BOD, 5-day, 20 deg. Cdaily average≤ 1.2 lb/dall year101
BOD, 5-day, 20 deg. Cdaily maximum≤ 2.7 lb/dall year101
pHminimum≥ 6 SUall year101
pHmaximum≤ 9 SUall year101
Solids, total suspendeddaily average≤ 20 mg/Lall year101
Solids, total suspendeddaily maximum≤ 45 mg/Lall year101
Solids, total suspendeddaily average≤ 1.2 lb/dall year101
Solids, total suspendeddaily maximum≤ 2.7 lb/dall year101
Flow, in conduit or thru treatment plantdaily average≤ .015 MGDall year101
Flow, in conduit or thru treatment plantdaily maximum≤ .03 MGDall year101
Chlorine, total residualmonthly minimum≥ 1 mg/Lall year101
Enterococcidaily average≤ 35 CFU/100mLall year101
Enterococcidaily maximum≤ 89 CFU/100mLall year101
Whole Effluent Toxicity [WET] - M. beryllina7-day minimum≥ 7 %all yearTX1
Whole Effluent Toxicity [WET] - M. beryllinamonthly average minimum≥ 7 %all yearTX1
Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia)7-day minimum≥ 7 %all yearTX1
Whole Effluent Toxicity [WET] - Americamysis bahia (formerly Mysidopsis bahia)monthly average minimum≥ 7 %all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7-day minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)monthly average minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidia7-day minimumreport only (pass=0;fail=1)all yearTX1
Low Flow Pass/Fail Survival Test Static Renewal 7 Day Chronic Menidia menidiamonthly average minimumreport only (pass=0;fail=1)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Menidia menidia7-day minimumreport only (%)all yearTX1
NOEC Lethal Static Renewal 7 Day Chronic Menidia menidiamonthly average minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia7-day minimumreport only (%)all yearTX1
NOEC Sub-Lethal Static Renewal 7 Day Chronic Menidia menidiamonthly average minimumreport only (%)all yearTX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (pass=0;fail=1)all yearTX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (pass=0;fail=1)all yearTX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidia7-day minimumreport only (pass=0;fail=1)all yearTX1
Pass/Fail Sub-Lethal Static Renewal 7 Day Chronic Menidia menidiamonthly average minimumreport only (pass=0;fail=1)all yearTX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)7-day minimumreport only (%)all yearTX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)monthly average minimumreport only (%)all yearTX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidia7-day minimumreport only (%)all yearTX1
LOEC Lethal Survival Static Renewal 7 Day Chronic Menidia menidiamonthly average minimumreport only (%)all yearTX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)7-day minimumreport only (%)all yearTX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Americamysis bahia (Mysidopsis bahia)monthly average minimumreport only (%)all yearTX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidia7-day minimumreport only (%)all yearTX1
LOEC Sub-Lethal Reproduction Static Renewal 7 Day Chronic Menidia menidiamonthly average minimumreport only (%)all yearTX1
LC50 Pass/Fail Static 24Hr Acute Americamysis bahia (formerly Mysidopsis bahia)single samplereport only (pass=0;fail=1)all yearTXA
LC50 Pass/Fail Static 24Hr Acute Menidia menidiasingle samplereport only (pass=0;fail=1)all yearTXA

How strict are these limits?

Cited limits by parameter: Texas's rules and the federal ones.

Same industry: the 32 Petroleum Refining and Related Industries permits in Texas.

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Your permit document is the final word. As JSON: /api/v1/permits/TX0090948 · MCP: https://passage-data.com/mcp